Impact of excess application of growth inhibitor for initiation of seed dormancy in Rice (Oryza sativa L.)
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Date
2019
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International Journal of Chemical Studies
Abstract
A field experiment to induce dormancy in rice (Oryza sativa L.) was conducted during Kharif season, 2017-2018 at the experimental field of Department of Crop Physiology, ANDUA&T, Ayodhya to study the effect of foliar feeding with growth inhibitors by different concentration viz. Maleic Hydrazide (500ppm and 1000ppm) and Cycocel (500ppm and 1000ppm) along with untreated control. The experiment was laid out in randomized block design comprising nine treatments at two stages (viz. flowering stage and anthesis stage) in three replications. Observations had been studied in vivo on germination percentage, viability test. Yield characters i.e., number of tillers per plant, ear bearing tillers per plant and biomass per plant, number of seeds per panicle, grain yield per plant and harvest index. Among all the concentrations, maximum number of tillers per plant, ear bearing tillers per plant and number of seeds per panicle was recorded in MH@1000ppm, grain yield per plant and biomass per plant MH@500ppm, harvest index was found maximum in cycocel @500ppm followed by MH@1000ppm where as maximum inhibition of germination was observed with cycocel@1000ppm followed by MH @1000ppm and cycocel @500ppm but cycocel @ 500ppm was found most appropriate and was very much effective for safe induction of seed dormancy in rice because of its minimum viability loss. Loss in viability was may be due to some toxic effect caused by high concentration of MH and cycocel.
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